Marvel Ultimate Alliance Cheats for Xbox

Up,Up,Down,Down,Left,Left,Left (you need to on the change team menu)

Complete the following tasks to unlock the corresponding costume
Unlock 2nd Costume:
Defeat 30 enemies Controlling that Character
Unlock 3rd Costume:
Defeat 175 enemies Controlling that Character
Unlock 4th Costume:
Get Bronze in that Characters Comic Mission

Unlock Silver Sufer and Daredevil:
To unlock both characters at the begining of the game go to the extraction point and load up the character change screen and enter in the code for the character you want to unlock. Daredevil will appear on the left side and behind him to the left will be the Silver Surfer.
Unlock DareDevil:
Left, Left, Right, Right, Up, Down, Up, Down, Start.

Unlocks Silver Sufer:
Down, Left, Left, Up, right, Up, Down, Left, Start.

Unlockable Heros and Modes
Complete the following tasks to unlock the corresponding effects. There are seven playable characters that can be unlocked.
Unlock Hard Mode:
On Easy or Normal mode complete the game
Unlock Nick Fury:
On Easy or Normal mode complete the game
Unlock Silver Surfer:
Defeat Galactus
Unlock Dr. Strange:
In Act 1 rescue him from Mandrin
Unlock Ghost Rider:
In Act 2 rescue him from Mephisto
Unlock Black Panther:
Collect Black Panther Action Figures throughout the game

Unlock Daredevil:
Collect Daredevil Action Figures throughout the game